Battery charger



FIG. 1 is a perspective view of a battery charger showing our new design.

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in FIG. 7 are included for the purpose of illustrating a portion of the charger that forms no part of the claimed design. 

The ornamental design for a battery charger, as shown and described. 